President Trump’s promise to protect the Strait of Hormuz with naval escorts and provide government-backed marine insurance underscores the urgent need to restore flows of energy from the Middle East before soaring prices rip through the world economy.

As of Wednesday, day five of the war on Iran, several thousand ships were stuck inside and outside the Persian Gulf, trapping roughly a fifth of the oil and liquefied natural gas the world consumes each day. The blockage is cascading through the region’s industry as storage tanks fill up with oil that can’t set sail, forcing producers to slash output.

The problem is most acute in Iraq, the world’s fifth-biggest producer. Output has more than halved, oil officials in the country said, with cutbacks at the southern Rumaila and West Qurna 2 fields.